diff --git a/ArcFormats/AliceSoft/ImageAJP.cs b/ArcFormats/AliceSoft/ImageAJP.cs new file mode 100644 index 00000000..5880ee0d --- /dev/null +++ b/ArcFormats/AliceSoft/ImageAJP.cs @@ -0,0 +1,201 @@ +//! \file ImageAJP.cs +//! \date Mon Sep 12 21:25:27 2016 +//! \brief AliceSoft JPEG image. +// +// Copyright (C) 2016 by morkt +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the "Software"), to +// deal in the Software without restriction, including without limitation the +// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or +// sell copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS +// IN THE SOFTWARE. +// + +using System.ComponentModel.Composition; +using System.IO; +using System.Windows.Media; +using System.Windows.Media.Imaging; +using GameRes.Utility; + +namespace GameRes.Formats.AliceSoft +{ + internal class AjpMetaData : ImageMetaData + { + public uint ImageOffset; + public uint ImageSize; + public uint AlphaOffset; + public uint AlphaSize; + } + + [Export(typeof(ImageFormat))] + public class AjpFormat : ImageFormat + { + public override string Tag { get { return "AJP"; } } + public override string Description { get { return "AliceSoft JPEG image format"; } } + public override uint Signature { get { return 0x504A41; } } // 'AJP' + + internal static byte[] Key = { + 0x5D, 0x91, 0xAE, 0x87, 0x4A, 0x56, 0x41, 0xCD, 0x83, 0xEC, 0x4C, 0x92, 0xB5, 0xCB, 0x16, 0x34 + }; + + public override ImageMetaData ReadMetaData (Stream stream) + { + var header = new byte[0x18]; + stream.Position = 0xC; + if (header.Length != stream.Read (header, 0, header.Length)) + return null; + return new AjpMetaData + { + Width = LittleEndian.ToUInt32 (header, 0), + Height = LittleEndian.ToUInt32 (header, 4), + BPP = 32, + ImageOffset = LittleEndian.ToUInt32 (header, 8), + ImageSize = LittleEndian.ToUInt32 (header, 0xC), + AlphaOffset = LittleEndian.ToUInt32 (header, 0x10), + AlphaSize = LittleEndian.ToUInt32 (header, 0x14), + }; + } + + public override ImageData Read (Stream stream, ImageMetaData info) + { + var meta = (AjpMetaData)info; + int stride = (int)meta.Width * 4; + byte[] pixels; + using (var jpeg = DecryptStream (stream, meta.ImageOffset, meta.ImageSize)) + { + var decoder = new JpegBitmapDecoder (jpeg, + BitmapCreateOptions.None, BitmapCacheOption.OnLoad); + BitmapSource bitmap = decoder.Frames[0]; + if (bitmap.Format.BitsPerPixel != 32) + bitmap = new FormatConvertedBitmap (bitmap, PixelFormats.Bgr32, null, 0); + + pixels = new byte[stride * (int)meta.Height]; + bitmap.CopyPixels (pixels, stride, 0); + } + using (var mask = DecryptStream (stream, meta.AlphaOffset, meta.AlphaSize)) + { + var alpha = ReadMask (mask); + int src = 0; + for (int dst = 3; dst < pixels.Length; dst += 4) + { + pixels[dst] = alpha[src++]; + } + return ImageData.Create (info, PixelFormats.Bgra32, null, pixels, stride); + } + } + + Stream DecryptStream (Stream input, uint offset, uint size) + { + var header = new byte[Key.Length]; + input.Position = offset; + input.Read (header, 0, header.Length); + for (int i = 0; i < header.Length; ++i) + header[i] ^= Key[i]; + if (size > header.Length) + { + var rest = new StreamRegion (input, input.Position, size - header.Length, true); + return new PrefixStream (header, rest); + } + else + return new MemoryStream (header, 0, (int)size); + } + + byte[] ReadMask (Stream input) + { + var header = new byte[0x40]; + input.Read (header, 0, header.Length); + int width = LittleEndian.ToInt32 (header, 0x18); + int height = LittleEndian.ToInt32 (header, 0x1C); + int data_offset = LittleEndian.ToInt32 (header, 0x20); + int pal_offset = LittleEndian.ToInt32 (header, 0x24); + var pixels = new byte[width * height]; + int dst = 0; + input.Position = data_offset; + while (dst < pixels.Length) + { + int c = input.ReadByte(); + if (-1 == c) + break; + if (c < 0xF8) + { + pixels[dst++] = (byte)c; + continue; + } + + int count = 0; + switch (c) + { + case 0xF8: + pixels[dst++] = (byte)input.ReadByte(); + break; + + case 0xFC: + count = input.ReadByte(); + input.Read (pixels, dst, 2); + count = count * 2 + 4; + Binary.CopyOverlapped (pixels, dst, dst+2, count); + dst += count+2; + break; + + case 0xFD: + count = input.ReadByte() + 4; + byte b = (byte)input.ReadByte(); + while (count --> 0) + pixels[dst++] = b; + break; + + case 0xFE: + count = input.ReadByte() + 3; + Binary.CopyOverlapped (pixels, dst - width*2, dst, count); + dst += count; + break; + + case 0xFF: + count = input.ReadByte() + 3; + Binary.CopyOverlapped (pixels, dst - width, dst, count); + dst += count; + break; + + default: + throw new InvalidFormatException(); + } + } + input.Position = pal_offset; + var index = ReadGrayPalette (input); + for (int i = 0; i < pixels.Length; ++i) + pixels[i] = index[pixels[i]]; + return pixels; + } + + byte[] ReadGrayPalette (Stream input) + { + var palette = new byte[0x300]; + if (0x300 != input.Read (palette, 0, 0x300)) + throw new EndOfStreamException(); + var gray = new byte[0x100]; + for (int i = 0; i < 0x100; ++i) + { + int c = i * 3; + gray[i] = (byte)((palette[c] + palette[c+1] + palette[c+2]) / 3); + } + return gray; + } + + public override void Write (Stream file, ImageData image) + { + throw new System.NotImplementedException ("AjpFormat.Write not implemented"); + } + } +}